后角是在正交平面中测量的主后刀面与切削平面的夹角,只有正值。后角愈大,刀具与工件之间 发布时间:2017-06-28 23:14 │ 来源:www.tikuol.com 题型:判断题 问题: 后角是在正交平面中测量的主后刀面与切削平面的夹角,只有正值。后角愈大,刀具与工件之间的磨擦愈小,但刀具强度也愈差。
题型:判断题 阅读理解。From: ChinaName: MeimeiAge: 13Class:Class 6,Grade 7Tel: 83365014 From: the USAName: KingAge: 15Class:Class 10 ,Grade 9Tel: 83005533 From: CanadaName: AliceAge: 14Class:Class 18 ,Grade 8Tel: 83889765 1. Where is Meimei from? She is from _____.2. What class is Meimei in ? She is in _____.3. What is King's telephone number ? It's _____.4. What grade is Alice in ? She is in _____.5. How old is Alice? She is _____. 查看答案
题型:判断题 小王沿街匀速行走,发现每隔6分钟从背后驶过一辆18路公交车,每隔3分钟从迎面驶来一辆18路公交车.假设每辆18路公交车行驶速度相同,而且18路公交车总站每隔固定时间发一辆车,那么发车间隔的时间是[ ]A.3分钟B.4分钟C.5分钟D.6分钟 查看答案